Much to the chagrin of zombies everywhere, this is not —and I quote–“BR-R-R-RAIN-NSss”, but rather a “brain cactus”. This is a morphological variant of the species Mammillaria elongata DC., or golden star cactus. The distinct morphology of this and other brain cacti, known as cristate or crested growth, is caused by an apical meristem gone awry.
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